CN102010696A - Water-based barite liquid plugging agent with thermal sensitivity - Google Patents
Water-based barite liquid plugging agent with thermal sensitivity Download PDFInfo
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- CN102010696A CN102010696A CN2010105656038A CN201010565603A CN102010696A CN 102010696 A CN102010696 A CN 102010696A CN 2010105656038 A CN2010105656038 A CN 2010105656038A CN 201010565603 A CN201010565603 A CN 201010565603A CN 102010696 A CN102010696 A CN 102010696A
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- plugging agent
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Abstract
The invention relates the technical field of plugging agents for well drilling and relates to a water-based barite liquid plugging agent with thermal sensitivity. The formula of the plugging agent comprises the following components in percentage by mass: 27 to 31.2 percent of tap water, 0.3 to 0.6 percent of zinc stearate, 0.4 to 0.6 percent of sulfonated tanning extract for drilling fluid and 68 to 72 percent of blanc fixe. The plugging agent is prepared by a site mechanical mixing method. Experiments verify that the plugging agent overcomes the technical defects of low adaptability, no thermosensitive synergistic action and low plugging success rate in the prior art, and the technical defect that the plugging agent in the prior art cannot replace cement slurry to form compact plugs in a mine shaft, has the advantages of high adaptability, obvious high filtration thermosensitive synergistic action and high plugging success rate, can replace the cement slurry to form compact plugs in the mine shaft under complicated conditions of treating blowout and leakage, avoids risks of safety accidents easily occurring during cement slurry smashing and also has the advantages of low cost and environmental friendliness.
Description
Technical field
The present invention relates to drilling well plugging agent technical field, exactly relate to a kind of water base barite liquid plugging agent with sensitive characteristic.
Background technology
Plugging agent is extensive use of in the drilling well industry.When drilling process generation leakage, need starch the shutoff stratum with leak stopping, could recover drilling well after the elimination leakage.
Existing drilling well bridging plug plugging agent commonly used, nutshell particle, vegetable fibre or the mineral fibre of common various particle diameters of employing of its component or different length, sheet mineral etc. are mixed by a certain percentage and form.
As publication number is CN101638577, open day is the patent documentation on February 3rd, 2010, a kind of used for drilling of oil and gas wells in oil fields natural feather plugging fiber and preparation method thereof is disclosed, its fiber includes: 120 parts of poultry feather (water content＜25%) 100-120 parts, tensio-active agent 0.2-0.4 part, clean-out system 0.0-0.8 part, alkaline defatting agent 1.0-3.0 part, clear water, has good dispersity, plugging effect is good, low cost of manufacture, characteristics free from environmental pollution.
Under the prior art condition, the method preparation that plugging agent generally adopts on-the-spot machinery to be mixed: the method for mechanical disintegration or cut mechanically is processed into nutshell, vegetable fibre, mineral fibre etc. the starting material of desired size, leak the speed size according to leakage and determine various raw-material formula rates, with of the method preparation of various starting material with mechanically mixing.Product generally is divided into carse, medium and small three kinds of models, and thick type plugging agent is used for the big fractured leakage of shutoff, and medium-sized plugging agent is used for the general fractured leakage of shutoff, and thin type plugging agent is used for hole or microfracture leakage.Select plugging agent type and dosage according to the leakage situation during on-the-spot the utilization, preparation has pumpability leak stopping slurry, and pump to absorption well section is carried out plugging operations.
But also there are certain shortcoming in employed plugging agent in the prior art, and the disclosed plugging agent of above-mentioned open file:
On the one hand, because under the prior art condition, the accurately size of crack, type shape under the gage well, can only select the type and the dosage of plugging agent by rule of thumb, therefore, usually there will be two kinds of situations: a kind of is that the plugging agent model selected is bigger than normal, and plugging agent is deposited in the crack surface, do not advance drop ply, " false stifled " existing picture occurs; It is too small that another kind is exactly that plugging agent is selected, and at stratum crack place effectively " bridge formation ", all enters crack depths, stratum, and can't realize the shutoff to crack.
On the other hand, existing leak stopping slurry does not have thermal sensitive effect, can not bring into play the effect that strengthens plugging effect with the rising of downhole temperature.
The shortcoming of above-mentioned two aspects, cause existing plugging agent exist adaptability strong, do not have temperature-sensitive synergism, leak stopping success ratio not high enough, in pit shaft, can not replace grout to form the technological deficiency of fine and close stopper simultaneously.
Summary of the invention
For solving the problems of the technologies described above, the present invention proposes a kind of water base barite liquid plugging agent with sensitive characteristic, adopt the present invention, it is not strong to have solved in the prior art existing adaptability, there is not the temperature-sensitive synergism, the leak stopping success ratio is not high enough, simultaneously in pit shaft, can not replace grout to form the technological deficiency of fine and close stopper, it is strong that the present invention has adaptability, the synergism of high dehydration temperature-sensitive is remarkable, the advantage that the leak stopping success ratio is high, especially when handling " simultaneous happeness of loss circulation and blowout " complexcase, can replace grout in pit shaft, to form fine and close stopper, be prone to the risk of security incident when having avoided fetching water mud, it is low to have cost simultaneously, advantage free from environmental pollution.
The present invention realizes by adopting following technical proposals:
A kind of water base barite liquid plugging agent with sensitive characteristic, it is characterized in that: prescription by mass percentage is as follows:
Tap water: 27%-31.2%;
Zinic stearas: 0.3%-0.6%;
Drilling fluid sulfonation tannin extract: 0.4%-0.6%;
Ground barium sulfate: 68-72%.
As the present invention's technical scheme further, prescription by mass percentage is as follows:
Tap water: 27.2%-31.2%;
Zinic stearas: 0.3%-0.6%;
Drilling fluid sulfonation tannin extract: 0.5%-0.6%;
Ground barium sulfate: 68%-71.6%;
Form No. one plugging agent.
As the present invention's technical scheme further, prescription by mass percentage is as follows:
Tap water: 27%-27.9%;
Zinic stearas: 0.4%-0.5%;
Drilling fluid sulfonation tannin extract: 0.4%-0.5%;
Ground barium sulfate: 71.3%-72%;
Form No. two plugging agent.
Said tap water is meant the water that meets the requirement of GB5749-85 city tap-water.
Said Zinic stearas is that the employing standard No. is a said Zinic stearas in the HG/T 3667-2000 file.
Said drilling fluid is that the employing standard No. is a said drilling fluid sulfonation tannin extract in the SY/T 5091-93 file with the sulfonation tannin extract.
Said ground barium sulfate is that the employing standard No. is a said ground barium sulfate in the GB/T 5005-2001 file.
Compared with prior art, the beneficial effect that the present invention reached is as follows:
One, among the present invention, adopt by mass percentage, the tap water of 27%-31.2%, the Zinic stearas of 0.3%-0.6%, the drilling fluid of the 0.4%-0.6% such prescription of ground barium sulfate of sulfonation tannin extract and 68%-72%, the plugging agent that the method that adopts on-the-spot machinery to be mixed prepares, compare with plugging agent of the prior art, system and component have been done the essence change, the leak stopping slurry that forms is through experimental verification, it is not strong that this programme has solved in the prior art existing adaptability, there is not the temperature-sensitive synergism, the leak stopping success ratio is not high enough, simultaneously can not replace grout to form the technological deficiency of fine and close stopper in pit shaft, it is strong to have adaptability, the synergism of high dehydration temperature-sensitive is remarkable, the advantage that the leak stopping success ratio is high.
Two, among the present invention, a said plugging agent, it is not strong to have solved in the prior art existing adaptability better, there is not the temperature-sensitive synergism, the leak stopping success ratio is not high enough, simultaneously in pit shaft, can not replace grout to form the technological deficiency of fine and close stopper, it is strong to have adaptability, the synergism of high dehydration temperature-sensitive is remarkable, the advantage that the leak stopping success ratio is high, especially when handling " simultaneous happeness of loss circulation and blowout " complexcase, can replace grout in pit shaft, to form fine and close stopper, be prone to the risk of security incident when having avoided fetching water mud, it is low to have cost simultaneously, advantage free from environmental pollution.
Three, among the present invention, said No. two plugging agents, has the advantage that the synergism of strong, the high dehydration temperature-sensitive of adaptability is remarkable, the leak stopping success ratio is high, especially when handling " simultaneous happeness of loss circulation and blowout " complexcase, can replace grout in pit shaft, to form fine and close stopper, be prone to the risk of security incident when having avoided fetching water mud, have cost advantage low, free from environmental pollution simultaneously, be particularly useful for the plugging operations on general fractured leakage stratum.
The present invention is described in further detail below in conjunction with embodiment.
Embodiment
Embodiment 1
The invention discloses a kind of water base barite liquid plugging agent with sensitive characteristic, its ultimate principle is the water base barite slurry of temperature-sensitive that utilizes formulated at leakage channel rapid precipitation Cheng Sai nearby or in the pit shaft, the leakage channel of shutoff different shape.The card larynx bridge formation that is different from general bridging plug plugging agent is filled principle.Prescription by mass percentage is as follows: tap water: 31.2%; Zinic stearas: 0.3%; Drilling fluid sulfonation tannin extract: 0.5%; Ground barium sulfate: 68%.Said tap water refers to meet the water of GB5749-85 city tap-water requirement.Said Zinic stearas is that the employing standard No. is a said Zinic stearas in the HG/T 3667-2000 file.Said drilling fluid is that the employing standard No. is a said drilling fluid sulfonation tannin extract in the SY/T 5091-93 file with the sulfonation tannin extract.Said ground barium sulfate is that the employing standard No. is a said ground barium sulfate in the GB/T 5005-2001 file.The method preparation that above-mentioned prescription is mixed according to on-the-spot machinery, through experiment, has the advantage that the synergism of strong, the high dehydration temperature-sensitive of adaptability is remarkable, the leak stopping success ratio is high, especially when handling " simultaneous happeness of loss circulation and blowout " complexcase, can replace grout in pit shaft, to form fine and close stopper, be prone to the risk of security incident when having avoided fetching water mud, have cost advantage low, free from environmental pollution simultaneously.This technology applies to sword door 1 well, at the open hole section Cheng Sai of 6830 ~ 6864m well depth, obtains the effect of pressure-bearing 60MPa.
Embodiment 2
As one of best mode for carrying out the invention, the present invention's prescription by mass percentage is as follows: tap water: 27.9%; Zinic stearas: 0.4%; Drilling fluid sulfonation tannin extract: 0.4%; Ground barium sulfate: 71.3%.All the other are with embodiment 1.
Embodiment 3
Optimum formula as a plugging agent is: tap water: 28%; Zinic stearas: 0.45%; Drilling fluid sulfonation tannin extract: 0.55%; Ground barium sulfate: 71%.All the other are with embodiment 1
Embodiment 4
As one of best mode for carrying out the invention, the present invention's prescription by mass percentage is as follows: tap water: 27%-27.9%; Zinic stearas: 0.4%-0.5%; Drilling fluid sulfonation tannin extract: 0.4%-0.5%; Ground barium sulfate: 71.3%-72%.The method preparation of adopting on-the-spot machinery to be mixed, form No. two plugging agent, through experiment, has the advantage that the synergism of strong, the high dehydration temperature-sensitive of adaptability is remarkable, the leak stopping success ratio is high, especially when handling " simultaneous happeness of loss circulation and blowout " complexcase, can replace grout in pit shaft, to form fine and close stopper, be prone to the risk of security incident when having avoided fetching water mud, have cost advantage low, free from environmental pollution simultaneously.Be applicable to the leak stopping effect on general fractured leakage stratum.
Embodiment 5
Optimum formula as No. two plugging agents is: tap water: 27.5%; Zinic stearas: 0.5%; Drilling fluid sulfonation tannin extract: 0.5%; Ground barium sulfate: 71.5%.All the other are with embodiment 1.
The foregoing description can adopt the mechanical compounding method preparation in scene of the prior art.
Claims (7)
- , a kind of water base barite liquid plugging agent with sensitive characteristic, it is characterized in that: prescription by mass percentage is as follows:Tap water: 27%-31.2%;Zinic stearas: 0.3%-0.6%;Drilling fluid sulfonation tannin extract: 0.4%-0.6%;Ground barium sulfate: 68-72%.
- 2. the water base barite liquid plugging agent with sensitive characteristic according to claim 1, it is characterized in that: prescription by mass percentage is as follows:Tap water: 27.2%-31.2%;Zinic stearas: 0.3%-0.6%;Drilling fluid sulfonation tannin extract: 0.5%-0.6%;Ground barium sulfate: 68%-71.6%;Form No. one plugging agent.
- 3. the water base barite liquid plugging agent with sensitive characteristic according to claim 1, it is characterized in that: prescription by mass percentage is as follows:Tap water: 27%-27.9%;Zinic stearas: 0.4%-0.5%;Drilling fluid sulfonation tannin extract: 0.4%-0.5%;Ground barium sulfate: 71.3%-72%;Form No. two plugging agent.
- 4. according to claim 1 or 2 or 3 described water base barite liquid plugging agents with sensitive characteristic, it is characterized in that: said tap water is meant the water that meets the requirement of GB5749-85 city tap-water.
- 5. according to claim 1 or 2 or 3 described water base barite liquid plugging agents with sensitive characteristic, it is characterized in that: said Zinic stearas is that the employing standard No. is a said Zinic stearas in the HG/T 3667-2000 file.
- 6. according to claim 1 or 2 or 3 described water base barite liquid plugging agents with sensitive characteristic, it is characterized in that: said drilling fluid is that the employing standard No. is a said drilling fluid sulfonation tannin extract in the SY/T 5091-93 file with the sulfonation tannin extract.
- 7. according to claim 1 or 2 or 3 described water base barite liquid plugging agents with sensitive characteristic, it is characterized in that: said ground barium sulfate is that the employing standard No. is a said ground barium sulfate in the GB/T 5005-2001 file.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010565603 CN102010696B (en) | 2010-11-30 | 2010-11-30 | Water-based barite liquid plugging agent with thermal sensitivity |
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| CN 201010565603 CN102010696B (en) | 2010-11-30 | 2010-11-30 | Water-based barite liquid plugging agent with thermal sensitivity |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053631A (en) * | 1991-02-11 | 1991-08-07 | 大庆石油管理局井下作业公司 | Temperarily blocking agent for water soluble stratum |
| CN1690161A (en) * | 2004-04-29 | 2005-11-02 | 中国石油化工股份有限公司 | Follow-drilling plugging agent and its preparation method and use |
| US20070042914A1 (en) * | 2005-08-17 | 2007-02-22 | Bruce Robertson | Rapid setting plugging compositions for sealing subterranean formations |
-
2010
- 2010-11-30 CN CN 201010565603 patent/CN102010696B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1053631A (en) * | 1991-02-11 | 1991-08-07 | 大庆石油管理局井下作业公司 | Temperarily blocking agent for water soluble stratum |
| CN1690161A (en) * | 2004-04-29 | 2005-11-02 | 中国石油化工股份有限公司 | Follow-drilling plugging agent and its preparation method and use |
| US20070042914A1 (en) * | 2005-08-17 | 2007-02-22 | Bruce Robertson | Rapid setting plugging compositions for sealing subterranean formations |
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| CN102010696B (en) | 2013-03-20 |
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Effective date of registration: 20200917 Address after: 100007 Beijing, Dongzhimen, North Street, No. 9, No. Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Chuanqing Drilling Engineering Co.,Ltd. Address before: The 1 section of No. 3 company Chuanqing Drilling Technology Information Office Chenghua District Green Road 610051 Chengdu City, Sichuan Province Patentee before: CNPC Chuanqing Drilling Engineering Co.,Ltd. |